Brilliant episode. Very old series-like pretty much consistently. The portrayal of the Sontarans was good (didn't like Skorr's voice though), Murray's music was good for the most part (although there was a bit much of it). The Donna/family stuff was played as it should have been. Martha and Donna got along (and it was lovely seeing Martha again). UNIT's return was excellent -- I really like how UNIT has evolved. David Tennant was on top form as the Doctor, and the writing of his character really excelled. Can't really pick too many flaws with it, actually. Definitely a strong 9/10.
Although I considered giving it lower for the Adipose cameo. I have edited that scene out in my version.
